diff --git a/frameworks/native/backup_ext/include/ext_extension.h b/frameworks/native/backup_ext/include/ext_extension.h
index 7315efd2a009550e9fce5531d8d6c374b42cb81e..5a51d6e2c7fe2453322951a7c69e4214f502023d 100644
--- a/frameworks/native/backup_ext/include/ext_extension.h
+++ b/frameworks/native/backup_ext/include/ext_extension.h
@@ -263,7 +263,7 @@ private:
     void DeleteBackupIncrementalTars(const string &tarName);
     void SetClearDataFlag(bool isClearData);
     std::string GetBundlePath();
-    std::vector<ExtManageInfo> GetExtManageInfo();
+    std::vector<ExtManageInfo> GetExtManageInfo(bool isSpecialVersion = false);
     ErrCode RestoreFilesForSpecialCloneCloud();
     void RestoreBigFilesForSpecialCloneCloud(const ExtManageInfo &item);
     ErrCode RestoreTarForSpecialCloneCloud(const ExtManageInfo &item);
diff --git a/frameworks/native/backup_ext/src/ext_extension.cpp b/frameworks/native/backup_ext/src/ext_extension.cpp
index f92dbab7c8c4060c65aede57daff9306409fdac4..969046532b18cb7d31d6d218e6ab5db52ea3a4eb 100644
--- a/frameworks/native/backup_ext/src/ext_extension.cpp
+++ b/frameworks/native/backup_ext/src/ext_extension.cpp
@@ -150,9 +150,9 @@ static std::set<std::string> GetIdxFileData(const string &bundleName)
     return cache.GetExtManage();
 }
 
-std::vector<ExtManageInfo> BackupExtExtension::GetExtManageInfo()
+std::vector<ExtManageInfo> BackupExtExtension::GetExtManageInfo(bool isSpecialVersion)
 {
-    string indexFileRestorePath = GetIndexFileRestorePath(bundleName_);
+    string indexFileRestorePath = isSpecialVersion ? INDEX_FILE_RESTORE : GetIndexFileRestorePath(bundleName_);
     string filePath = BExcepUltils::Canonicalize(indexFileRestorePath);
     UniqueFd idxFd(open(filePath.data(), O_RDONLY));
     if (idxFd < 0) {
diff --git a/frameworks/native/backup_ext/src/sub_ext_extension.cpp b/frameworks/native/backup_ext/src/sub_ext_extension.cpp
index 71463bde160fab05a6b77f697f6026580b140010..7afcca49258a126614bbfdd3b79b7bee0ab7bb64 100644
--- a/frameworks/native/backup_ext/src/sub_ext_extension.cpp
+++ b/frameworks/native/backup_ext/src/sub_ext_extension.cpp
@@ -120,7 +120,7 @@ string BackupExtExtension::GetBundlePath()
 std::map<std::string, off_t> BackupExtExtension::GetIdxFileInfos(bool isSpecialVersion)
 {
     string restoreDir = isSpecialVersion ? "" : GetBundlePath();
-    auto extManageInfo = GetExtManageInfo();
+    auto extManageInfo = GetExtManageInfo(isSpecialVersion);
     std::map<std::string, off_t> idxFileInfos;
     for (size_t i = 0; i < extManageInfo.size(); ++i) {
         std::string realPath = restoreDir + extManageInfo[i].hashName;
diff --git a/frameworks/native/backup_ext/src/untar_file.cpp b/frameworks/native/backup_ext/src/untar_file.cpp
index ba4baff48ffb49877aeeb0fee697c70f03153702..8ba5e3bf822f15061b0b17e9d1b7cc233261ecd8 100644
--- a/frameworks/native/backup_ext/src/untar_file.cpp
+++ b/frameworks/native/backup_ext/src/untar_file.cpp
@@ -385,6 +385,7 @@ bool UntarFile::DealFileTag(ErrFileInfo &errFileInfo,
             errFileInfo[info.fullPath].push_back(DEFAULT_ERR);
             return false;
         }
+        isFilter = true;
         return true;
     }
     info.fullPath = GenRealPath(rootPath_, info.fullPath);
diff --git a/tests/unittests/backup_ext/untar_file_test.cpp b/tests/unittests/backup_ext/untar_file_test.cpp
index f67ba503d2e56d996fa801bc22cf0c5cd57abc2e..79082c8cdba6b99ff9b5979023ec924d7b0d6cb8 100644
--- a/tests/unittests/backup_ext/untar_file_test.cpp
+++ b/tests/unittests/backup_ext/untar_file_test.cpp
@@ -487,4 +487,65 @@ HWTEST_F(UntarFileTest, SUB_Untar_File_IncrementalUnPacket_0400, testing::ext::T
     GTEST_LOG_(INFO) << "UntarFileTest-end SUB_Untar_File_IncrementalUnPacket_0400";
 }
 
+
+/**
+ * @tc.number: SUB_Untar_File_IncrementalUnPacket_0500
+ * @tc.name: SUB_Untar_File_IncrementalUnPacket_0500
+ * @tc.desc: 测试 IncrementalUnPacket 接口
+ * @tc.size: MEDIUM
+ * @tc.type: FUNC
+ * @tc.level Level 1
+ * @tc.require: I6F3GV
+ */
+HWTEST_F(UntarFileTest, SUB_Untar_File_IncrementalUnPacket_0500, testing::ext::TestSize.Level1)
+{
+    GTEST_LOG_(INFO) << "UntarFileTest-begin SUB_Untar_File_IncrementalUnPacket_0500";
+    try {
+        // 预置文件和目录
+        TestManager tm("SUB_Untar_File_IncrementalUnPacket_0500");
+        string root = tm.GetRootDirCurTest();
+        string testDir = root + "/testdir/";
+        if (mkdir(testDir.data(), S_IRWXU) && errno != EEXIST) {
+            GTEST_LOG_(INFO) << " invoked mkdir failure, errno :" << errno;
+            throw BError(errno);
+        }
+        string aFile = testDir + "a.txt";
+        string bFile = testDir + "b.txt";
+        SaveStringToFile(aFile, "hello");
+        SaveStringToFile(bFile, "world");
+        // 打 tar
+        TarMap tarMap {};
+        vector<string> smallFiles;
+        smallFiles.emplace_back(aFile);
+        smallFiles.emplace_back(bFile);
+        auto reportCb = [](std::string msg, int err) {
+            return;
+        };
+        TarFile::GetInstance().Packet(smallFiles, "test", root, tarMap, reportCb);
+        // 首次恢复
+        string tarFile = root + "/test.0.tar";
+        string rootPath(root);
+        unordered_map<string, struct ReportFileInfo> cloudFiles;
+        cloudFiles.emplace(make_pair(aFile.substr(1), ReportFileInfo())); // 1: the pos of /
+        cloudFiles.emplace(make_pair(bFile.substr(1), ReportFileInfo())); // 1: the pos of /
+        auto result = UntarFile::GetInstance().IncrementalUnPacket(tarFile, rootPath, cloudFiles);
+        EXPECT_EQ(std::get<1>(result).size(), 2); // 1: First ele, 2: 2 files, aFile and bFile
+        EXPECT_EQ(std::get<0>(result), 0);
+        // 增量恢复，aFile 有变化
+        cloudFiles.erase(aFile.substr(1)); // 1: the pos of /
+        result = UntarFile::GetInstance().IncrementalUnPacket(tarFile, rootPath, cloudFiles);
+        EXPECT_EQ(std::get<0>(result), 0);
+        EXPECT_EQ(std::get<1>(result).size(), 1); // 1: the first ele, 1: result size -> bFile
+        // 恢复归一后 clone等其他场景，rp文件没数据
+        cloudFiles.erase(bFile.substr(1)); // 1: the pos of /
+        result = UntarFile::GetInstance().IncrementalUnPacket(tarFile, rootPath, cloudFiles);
+        EXPECT_EQ(std::get<0>(result), 0);
+        EXPECT_EQ(std::get<1>(result).size(), 2); // 1: First ele, 2: 2 files, aFile and bFile
+        ClearCache();
+    } catch (...) {
+        EXPECT_TRUE(false);
+        GTEST_LOG_(INFO) << "UntarFileTest-an exception occurred by UntarFile.";
+    }
+    GTEST_LOG_(INFO) << "UntarFileTest-end SUB_Untar_File_IncrementalUnPacket_0500";
+}
 } // namespace OHOS::FileManagement::Backup
\ No newline at end of file